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I just came across this piece by John Gribbin, interesting for many reasons.
Glasgow University started awarding degrees to women in 1892; contrast Cambridge University’s 1948.
Auguste Comte, 1835: “We will never be able to determine the chemical composition of the stars”.
1802, Wollaston observes Fraunhofer lines
1814, Fraunhofer independently observes Fraunhofer lines. Perhaps a reader can tell me why they are named after Fraunhofer, not Wollaston
1859, Kirchhoff (of circuit laws fame) and, independently, Bunsen (of Bunsen burner fame) match Fraunhofer lines to atomic spectra, infer chemical composition of stars
1868, Lockyer correctly identifies third solar Fraunhofer line in “sodium yellow” region as due to a new element, names it “helium”1892, Glasgow University starts awarding degrees to women
~1923 (see below), Cecilia Payne (later Payne-Gaposhkin) completes studies at Cambridge, but cannot formally graduate because she is a woman
1925, Cecilia Payne gains Ph.D. from Radcliffe; unravels highly complex (see below) Fraunhofer lines of stars; shows that, contrary to all then current expectation, stellar composition is dominated by hydrogen and helium1948, Cambridge University starts awarding degrees to women

Posting this in response to a question I was asked. It is essentially an extract from my book 13.8

Cecilia Payne won a scholarship to Newnham College, Cambridge (the only way she could have afforded a university education) in 1919. She studied botany, physics and chemistry, but also attended a talk by Arthur Eddington about the eclipse expedition on which he had famously “proved Einstein right” by measuring the way light from distant stars was bent by the Sun. This fired her interest in astronomy, and she visited the university’s observatory on an open night, plying the staff with so many questions that Eddington took an interest, and offered her the run of the observatory library, where she read about the latest developments in the astronomical journals.

After completing her studies (as a woman, she was allowed to complete a degree course, but could not be awarded a degree; Cambridge…